CN1663142A - Outer loop uplink power control during link imbalance - Google Patents

Outer loop uplink power control during link imbalance Download PDF

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CN1663142A
CN1663142A CN038140128A CN03814012A CN1663142A CN 1663142 A CN1663142 A CN 1663142A CN 038140128 A CN038140128 A CN 038140128A CN 03814012 A CN03814012 A CN 03814012A CN 1663142 A CN1663142 A CN 1663142A
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channel condition
snr
threshold value
average
pilot
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CN100468984C (en
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D·P·马拉迪
S·维伦尼格
T·陈
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Qualcomm Inc
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/22—TPC being performed according to specific parameters taking into account previous information or commands
    • H04W52/225—Calculation of statistics, e.g. average or variance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/06—TPC algorithms
    • H04W52/12—Outer and inner loops
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/241—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR or Eb/lo
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non-transmission
    • H04W52/286—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non-transmission during data packet transmission, e.g. high speed packet access [HSPA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/20—TPC being performed according to specific parameters using error rate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/38—TPC being performed in particular situations
    • H04W52/40—TPC being performed in particular situations during macro-diversity or soft handoff

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Abstract

Uplink power control is provided to maintain the integrity of the uplink HS-DPCCH when the UE goes into SHO. The target pilot SNR threshold is controlled by considering the pilot signal strength of the serving Node-B and/or the uplink channel condition of the serving Node-B when deciding to increase or decrease the target pilot SNR threshold of Nodes-B.

Description

链路不平衡期间的外环上行链路功率控制Outer-loop uplink power control during link imbalance

                       发明背景Background of the Invention

技术领域technical field

本发明一般涉及无线通信领域，尤其涉及上行链路功率控制。尽管本发明有广泛的应用，但它尤其适用于蜂窝通信系统中，并且将结合蜂窝通信系统进行描述。The present invention relates generally to the field of wireless communications, and more particularly to uplink power control. Although the present invention has wide applicability, it is particularly applicable to and will be described in connection with cellular communication systems.

相关技术描述Related technical description

技术规范3GPP TS 25.211 v5.0.0(2002-03)、第三代合伙人计划(3GPP)；技术规范群组无线接入网络；物理信道以及传输信道到物理信道上的映射(FDD)(第5版)提供了一高速下行链路共享信道(HS-DSCH)。HS-DSCH是由一个或几个用户设备(UE)共享的下行链路传输信道。Technical Specification 3GPP TS 25.211 v5.0.0 (2002-03), Third Generation Partnership Project (3GPP); Technical Specification Group Radio Access Network; Physical Channels and Mapping of Transport Channels to Physical Channels (FDD) (No. 5 version) provides a high-speed downlink shared channel (HS-DSCH). HS-DSCH is a downlink transport channel shared by one or several user equipments (UEs).

在3GPP高速数据分组接入(HSDPA)中，对于下行链路上的专用物理信道(DPCH)，UE会在与多个节点B的软切换(SHO)中。然而，对于高速下行链路共享信道(HS-DSCH)和相应的上行链路高速专用物理控制信道(HS-DPCCH)没有HSDPA SHO。这会导致称为链路不平衡的情况。也就是，通过HS-DSCH服务高速数据的节点B与UE对DPCCH有最佳链路的节点B不同。In 3GPP High Speed Data Packet Access (HSDPA), for the Dedicated Physical Channel (DPCH) on the downlink, the UE will be in Soft Handover (SHO) with multiple Node Bs. However, there is no HSDPA SHO for the High Speed Downlink Shared Channel (HS-DSCH) and the corresponding Uplink High Speed Dedicated Physical Control Channel (HS-DPCCH). This results in a condition known as link imbalance. That is, the Node B that serves high-speed data over the HS-DSCH is different from the Node B that the UE has the best link to the DPCCH.

因此需要一种在链路不平衡期间用于上行链路功率控制的装置和方法，其考虑到反向链路HS-DPCH。There is therefore a need for an apparatus and method for uplink power control during link imbalance that takes into account the reverse link HS-DPCH.

附图说明Description of drawings

本发明的其它特征和优点将在下面的描述和附图中部分提出，其中描述并示出了本发明的优选实施例，在本领域的技术人员结合附图查阅了下列详细描述后，所述特征和优点也变得显而易见，或者可以通过实践本发明而得知。本发明的优点可以通过在所附权利要求中特别指出的仪器和组合来实现。Other features and advantages of the present invention will be set forth in part in the following description and accompanying drawings, which describe and illustrate preferred embodiments of the present invention, after those skilled in the art review the following detailed description in conjunction with the accompanying drawings, said Features and advantages will also become apparent or may be learned by practice of the invention. The advantages of the invention may be realized by the instruments and combinations particularly pointed out in the appended claims.

图1是按照本发明配置的通信系统的一般框图。Figure 1 is a generalized block diagram of a communication system configured in accordance with the present invention.

具体实施方式Detailed ways

图1说明了通信系统100的一般框图。用户设备(UE)102会与节点B1 104和节点B2 106进行无线通信。UE可以是诸如蜂窝电话或其它固定或移动的无线设备这样的设备。节点B会是诸如服务整个小区的蜂窝基站这样的设备。FIG. 1 illustrates a generalized block diagram of a communication system 100 . A user equipment (UE) 102 is in wireless communication with Node B1 104 and Node B2 106. A UE may be a device such as a cellular telephone or other fixed or mobile wireless device. A Node B would be a device such as a cellular base station serving an entire cell.

节点B1 104和节点B2 106会与无线网络控制器(RNC)108进行通信。RNC从节点B1和节点B2接收信号并且将控制信息等等提供给节点B1和节点B2。Node B1 104 and Node B2 106 communicate with a radio network controller (RNC) 108. The RNC receives signals from Node B1 and Node B2 and supplies control information and the like to Node B1 and Node B2.

UE 102会处在节点B1 104和节点B2 106的覆盖区域内，并且会通过各个信道与节点B1和节点B2通信。例如，节点B会通过下行链路信道将信号传送到UE，所述下行链路信道比如在图1中被标记为专用物理数据信道(DPDCH)和专用物理控制信道(DPCCH)这样的下行链路专用物理信道(DPCH)、以及高速下行链路共享信道(HS-DSCH)。UE会通过上行链路信道将信号发送到节点B，所述上行链路信道比如上行链路DPDCH、上行链路DPCCH、以及与下行链路HS-DSCH相关的高速专用物理控制信道(HS-DPCCH)。UE 102 will be within the coverage area of Node B1 104 and Node B2 106, and will communicate with Node B1 and Node B2 over various channels. For example, a Node B would transmit signals to UEs over downlink channels such as those labeled Dedicated Physical Data Channel (DPDCH) and Dedicated Physical Control Channel (DPCCH) in FIG. 1 . Dedicated Physical Channel (DPCH), and High Speed Downlink Shared Channel (HS-DSCH). The UE sends signals to the Node B through uplink channels such as the uplink DPDCH, the uplink DPCCH, and the High Speed Dedicated Physical Control Channel (HS-DPCCH) associated with the downlink HS-DSCH. ).

除了用于下行链路功率控制的反馈信息比特(FBI)和UP/DOWN(增加/降低)请求信号以外，UE 102会通过上行链路DPCCH发送由数据块组成的全向导频信号。In addition to Feedback Information Bits (FBI) and UP/DOWN (increase/decrease) request signals for downlink power control, the UE 102 transmits an omnidirectional pilot signal consisting of data blocks through the uplink DPCCH.

UE的导频信号会被导频信号范围内的节点B所接收。每个节点B都有一个目标导频信噪比(SNR)阈值T，希望在所述阈值T处从UE接收导频信号。每个接收导频信号的节点B都能计算接收到的导频信号的SNR。(块110和112)。如果所计算的SNR低于阈值T，则通过在DPCCH上发送一UP请求，节点B能请求UE增加导频信号的发送功率。(块114和116)。如果所计算的SNR高于阈值T，则通过在DPCCH上发送一DOWN请求，节点B能请求UE降低导频信号的发送功率。(块118和120)。The pilot signal of the UE will be received by Node Bs within the range of the pilot signal. Each Node B has a target pilot signal-to-noise ratio (SNR) threshold T at which it wishes to receive pilot signals from UEs. Each Node B receiving a pilot signal can calculate the SNR of the received pilot signal. (blocks 110 and 112). If the calculated SNR is lower than the threshold T, the Node B can request the UE to increase the transmit power of the pilot signal by sending an UP request on the DPCCH. (blocks 114 and 116). If the calculated SNR is higher than the threshold T, the Node B can request the UE to reduce the transmission power of the pilot signal by sending a DOWN request on the DPCCH. (blocks 118 and 120).

对几个DOWN取或确定了是增加还是降低导频信号强度。如果UE从任一节点B接收一DOWN请求，则降低UE的导频强度。如果UE从全部节点B接收UP请求，则增加UE的导频强度。Taking OR for several DOWNs determines whether to increase or decrease the pilot signal strength. If the UE receives a DOWN request from any Node B, then the UE's pilot strength is decreased. If the UE receives UP requests from all Node Bs, the UE's pilot strength is increased.

链路不平衡会在UE 102通过信道HS-DSCH从节点B1接收高速数据时出现，并且与节点B1和节点B2处在上行链路SHO状态。这个链路不平衡情况会在节点B2正在发送DOWN请求而节点B1正在发送UP请求时出现。此外，UE处于SHO状态下时会按照常规的对几个DOWN取或来改变其发送功率。Link imbalance can occur when UE 102 receives high speed data from Node B1 via channel HS-DSCH and is in uplink SHO state with Node B1 and Node B2. This link imbalance situation occurs when node B2 is sending a DOWN request while node B1 is sending an UP request. In addition, when the UE is in the SHO state, it will change its transmit power according to conventional ORing of several DOWNs.

由于HS-DPCCH的信号强度会按照UE内保存的话务对导频比与导频信号强度的减少成比例减少，因此UE 102降低导频信号发送功率会影响UE和节点B1 104之间的上行链路高速通信。Since the signal strength of the HS-DPCCH will decrease in proportion to the reduction of the pilot signal strength according to the traffic-to-pilot ratio stored in the UE, the reduction of the pilot signal transmission power by the UE 102 will affect the uplink between the UE and Node B1 104 Link high-speed communication.

在HSDPA中，节点B1会通过HS-DSCH向UE 102发送分组数据。UE通过HS-DSCH一次仅能从一个节点B接收分组数据。在图1中，节点B1 104是正在向UE发送分组数据的节点。会出现小区切换，所述小区切换将UE从接收来自节点B1的分组数据切换到通过与节点B2(未示出)相关的下行链路信道HS-DSCH而接收来自节点B2106的分组数据。较高层的信令实现了小区切换。然而，链路不平衡会在比小区切换短的时标上存在。In HSDPA, Node B1 sends packet data to UE 102 via HS-DSCH. A UE can only receive packet data from one Node B at a time through the HS-DSCH. In Figure 1, Node B1 104 is the node that is sending packet data to the UE. A cell handover occurs which switches the UE from receiving packet data from Node B1 to receiving packet data from Node B2 106 over the downlink channel HS-DSCH associated with Node B2 (not shown). Higher layer signaling implements cell handover. However, link imbalance may exist on a shorter time scale than cell switching.

UE 102会通过HS-DPCCH发送确认/不确认(ACK/NAK)信号。如果UE已经通过HS-DSCH成功地从服务节点B1接收到分组数据，则UE发送一ACK。相反，如果UE通过HS-DSCH不成功地从服务节点B1接收到分组数据，则UE发送一NAK。如果NAK被正在发送的节点B1所接收，正在发送的节点B1会重发前面发送的分组数据。如果UE丢失了与HS-DSCH相关的高速共享控制信道(HS-SCCH)，则UE就不发送任何东西(空)。HS-SCCH向UE表明在HS-DSCH上将来的传输即将到来。The UE 102 will send an acknowledgment/non-acknowledgement (ACK/NAK) signal through the HS-DPCCH. If the UE has successfully received packet data from the serving node B1 through the HS-DSCH, the UE sends an ACK. On the contrary, if the UE does not successfully receive packet data from the serving node B1 through the HS-DSCH, the UE sends a NAK. If the NAK is received by the sending node B1, the sending node B1 will retransmit the previously sent packet data. If the UE misses the High Speed Shared Control Channel (HS-SCCH) associated with the HS-DSCH, the UE does not send anything (null). The HS-SCCH indicates to the UE that future transmissions on the HS-DSCH are imminent.

在链路不平衡情况下，节点B2发送一DOWN请求。这使UE 102降低导频信号强度，并且相应地降低ACK/NAK的信号强度。ACK/NAK的降低了的强度会导致ACK被接收作为NAK，导致HS-DSCH上增加的传输；还会导致NAK或空被接收作为ACK，导致HS-DSCH上丢失的分组。In case of link imbalance, Node B2 sends a DOWN request. This causes UE 102 to reduce the pilot signal strength and correspondingly reduce the signal strength of the ACK/NAK. The reduced strength of ACK/NAK can result in ACKs being received as NAKs, resulting in increased transmissions on the HS-DSCH; and can also result in NAKs or nulls being received as ACKs, resulting in lost packets on the HS-DSCH.

而且，由于UE通过HS-DPCCH发送信道质量指示(CQI)，因此节点B1会接收错误的指示。Also, since the UE sends a Channel Quality Indication (CQI) through the HS-DPCCH, Node B1 may receive a wrong indication.

对这个问题的解决方案是使RNC 108监视导频强度，所述导频强度例如，节点B1 104所接收到的导频信号的平均SNR(块122)以及服务节点B1的平均块差错率(BLER)(块124)。这些参数可用于确定是增加还是降低目标导频SNR阈值T。A solution to this problem is to have the RNC 108 monitor pilot strengths such as the average SNR of the pilot signal received by Node B1 104 (block 122) and the average Block Error Rate (BLER ) (block 124). These parameters can be used to determine whether to increase or decrease the target pilot SNR threshold T.

RNC 108能计算通过两个节点B的上行链路DPCH发送的数据块的循环冗余校验(块126和128)。如果CRC对于两个信道都失败(块130)，RNC就指示节点B增加目标导频SNR阈值T(块132)。这又可能使节点B2将其请求从DOWN改变为UP。The RNC 108 can calculate a cyclic redundancy check (blocks 126 and 128) for data blocks sent over the uplink DPCHs of the two Node Bs. If the CRC fails for both channels (block 130), the RNC instructs the Node B to increase the target pilot SNR threshold T (block 132). This in turn may cause Node B2 to change its request from DOWN to UP.

如果CRC对于两个信道都不失败(块130)，则RNC 108确定正在发送高速分组数据的节点B1 104和UE 102之间的上行链路信道条件是否不令人满意(块134)，例如，确定平均导频信号SNR是否小于预定的阈值TH1，或者DPDCH上的块差错率(BLER)是否大于预定的阈值TH2，或其两者。如果上行链路信道条件是令人满意的，RNC 108就请求降低节点B的目标导频SNR阈值T(块136)。If the CRC fails for both channels (block 130), the RNC 108 determines whether the uplink channel condition between Node B1 104 and UE 102, which is sending high-speed packet data, is unsatisfactory (block 134), e.g., It is determined whether the average pilot signal SNR is less than a predetermined threshold TH1, or the block error rate (BLER) on the DPDCH is greater than a predetermined threshold TH2, or both. If the uplink channel conditions are satisfactory, the RNC 108 requests that the Node B's target pilot SNR threshold T be lowered (block 136).

如果正在发送高速数据分组的节点B1 104和UE 102之间的上行链路信道条件是不令人满意的(块134)，RNC 108就请求增加目标导频SNR阈值T(块138)。增加了的T使节点B2更可能将其DOWN请求改变为UP请求，这又防止UE导频强度按照多个DOWN取或而降低。If the uplink channel condition between Node B1 104 and UE 102, which is sending high-speed data packets, is unsatisfactory (block 134), RNC 108 requests to increase the target pilot SNR threshold T (block 138). The increased T makes it more likely that Node B2 will change its DOWN request to an UP request, which in turn prevents the UE pilot strength from degrading by ORing multiple DOWNs.

任选地，除了增加T(块138)以外，RNC会请求减小节点B的话务对导频比(块140)。减小话务对导频比通过减小与导频信号强度有关的话务信道强度而减小了平均反向链路干扰。Optionally, in addition to increasing T (block 138), the RNC may request a decrease in the Node B's traffic-to-pilot ratio (block 140). Reducing the traffic-to-pilot ratio reduces the average reverse link interference by reducing the traffic channel strength relative to the pilot signal strength.

本发明能有其它且不同的实施例，其几个细节能被修改。例如，尽管参照上述宽带码分多址(W-CDMA)的技术规范描述了本发明，然而本发明可等价地应用于CDMA2000 1xEV-DV。例如，下列3GPP术语对应于CDMA2000术语：UE对应于移动站(MS)；RNC对应于基站控制器(BSC)；HS-DSCH对应于前向分组数据信道(F-PDCH)；DPCH对应于基本信道/专用控制信道(FCH/DCCH)；HS-DPCCH对应于R-CQICH和R-ACKCH；以及BLER对应于帧差错率(FER)。The invention is capable of other and different embodiments, and its several details can be modified. For example, although the present invention has been described with reference to the above-mentioned specifications of Wideband Code Division Multiple Access (W-CDMA), the present invention is equally applicable to CDMA2000 1xEV-DV. For example, the following 3GPP terms correspond to CDMA2000 terms: UE corresponds to Mobile Station (MS); RNC corresponds to Base Station Controller (BSC); HS-DSCH corresponds to Forward Packet Data Channel (F-PDCH); DPCH corresponds to Fundamental Channel / Dedicated Control Channel (FCH/DCCH); HS-DPCCH corresponds to R-CQICH and R-ACKCH; and BLER corresponds to Frame Error Rate (FER).

节点B会是具有波束成形天线的蜂窝基站，所述蜂窝基站服务一个小区的各个扇区。在该情况下，对于同一基站的扇区间的链路不平衡，可以在服务UE的基站内执行RNC的功能。A Node B would be a cellular base station with beamforming antennas serving various sectors of a cell. In this case, for link imbalance between sectors of the same base station, the function of RNC can be performed in the base station serving the UE.

这里描述的图1所示模块的功能可以用专用硬件实现，或等价地用软件和处理器来实现。The functions of the modules shown in FIG. 1 described herein can be realized by dedicated hardware, or equivalently by software and a processor.

总之，这里描述的上行链路功率控制提供了在UE进入SHO时维持上行链路HS-DPCCH的完整性的优点。这主要通过控制目标导频SNR阈值来完成，所述控制这样实现：通过在决定增加或降低节点B的目标导频SNR阈值时考虑服务节点B1的导频信号强度和/或服务节点B1的上行链路信道条件。In summary, the uplink power control described here provides the advantage of maintaining the integrity of the uplink HS-DPCCH when the UE enters SHO. This is primarily done by controlling the target pilot SNR threshold by taking into account the serving Node B1's pilot signal strength and/or the serving Node B1's uplink Link channel condition.

本领域的技术人员会认识到，可以对本发明的功率控制技术、构造和操作作出其它修改和变化，这不背离本发明的范围和精神。Those skilled in the art will recognize that other modifications and variations can be made in the power control techniques, construction and operation of the present invention without departing from the scope and spirit of the invention.

Claims (19)

1. one kind is used for the device that up-link power is controlled, and comprising:
The definite logic that is used for the channel condition of definite uplink channel; And
Be used for when determined channel condition is unsatisfactory, increasing the target pilot signal to noise ratio (snr) threshold adjuster of target pilot SNR threshold value.
2. device as claimed in claim 1 is characterized in that also comprising a traffic to the pilot tone ratio regulators, and it is used for reducing traffic to the pilot tone ratio when increasing target pilot SNR threshold value.
3. device as claimed in claim 1 is characterized in that, described target pilot signal to noise ratio (snr) threshold adjuster reduces target pilot SNR threshold value when determined channel condition is satisfactory.
4. device as claimed in claim 1 is characterized in that, when the average SNR of pilot signal was lower than predetermined first threshold, determined channel condition was not satisfied.
5. device as claimed in claim 1 is characterized in that, the average block error rate on uplink data channel is during greater than predetermined second threshold value, and determined channel condition is not satisfied.
6. device as claimed in claim 1 is characterized in that, less than predetermined first threshold and the average block error rate on the uplink data channel during greater than predetermined second threshold value, determined channel condition is not satisfied in the average SNR of pilot signal.
7. one kind is used for the device that up-link power is controlled, and comprising:
Be used to calculate the signal to noise ratio snr averager of average signal-to-noise ratio or uplink pilot;
Be used to calculate the BLER (block error rate) BLER averager of average block error rate or uplink data signals;
Be used for that both determine that the channel condition of uplink channel is satisfactory or not satisfied definite logic according to average SNR or average BLER or its; And
Be used for the target pilot snr threshold adjuster that determined channel condition increases target pilot SNR threshold value when unsatisfactory and be used for reducing target pilot SNR threshold value when determined channel condition is satisfactory.
8. one kind is used for the method that up-link power is controlled, and comprising:
Determine the channel condition of up link; And
When determined channel condition is unsatisfactory, increase target pilot SNR threshold value.
9. method as claimed in claim 8 reduces traffic to the pilot tone ratio when it is characterized in that also being included in the increase of target pilot SNR threshold value.
10. method as claimed in claim 8 is characterized in that also being included in determined channel condition and reduces target pilot SNR threshold value when satisfactory.
11. method as claimed in claim 8 is characterized in that, during less than predetermined first threshold, determined channel condition is not satisfied in the average SNR of pilot signal.
12. method as claimed in claim 8 is characterized in that, the average block error rate on uplink data channel is during greater than predetermined second threshold value, and determined channel condition is not satisfied.
13. a method that is used for up-link power control comprises:
Calculate average SNR or uplink pilot;
Calculate average BLER or uplink data signals;
Both determine that the channel condition of up link is satisfactory or unsatisfactory according to average SNR or average BLER or its; And
When determined channel condition is unsatisfactory, increase target pilot SNR threshold value and when determined channel condition is satisfactory, reduce target pilot SNR threshold value.
14. a device that is used for up-link power control comprises:
The device that is used for the channel condition of definite uplink channel; And
Be used for when determined channel condition is unsatisfactory, increasing the device of target pilot SNR threshold value.
15. device as claimed in claim 14 reduces traffic to the pilot tone ratio when it is characterized in that also being included in the reduction of target pilot SNR threshold value.
16. device as claimed in claim 14 is characterized in that also being included in determined channel condition and reduces target pilot SNR threshold value when satisfactory.
17. device as claimed in claim 14 is characterized in that, when the average SNR of pilot signal was lower than predetermined first threshold, determined channel condition was not satisfied.
18. device as claimed in claim 14 is characterized in that, the average block error rate on uplink data channel is during greater than predetermined second threshold value, and determined channel condition is not satisfied.
19. a device that is used for up-link power control comprises:
Be used to calculate the device of average SNR or uplink pilot;
Be used to calculate the device of average BLER or uplink data channel;
Be used for that both determine that the channel condition of uplink channel is satisfactory or not satisfied device according to average SNR or average BLER or its; And
The device that is used for when determined channel condition is unsatisfactory, increasing target pilot SNR threshold value and is used for when determined channel condition is satisfactory, reducing target pilot SNR threshold value.
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